From patchwork Fri Mar 24 17:14:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florent Revest X-Patchwork-Id: 13187045 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 55095C7619A for ; Fri, 24 Mar 2023 17:15:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=92QLYudrD5GsnHHEqv9BCyBZ4DoSLI2KCH95O0sLOI8=; b=l0hDuCYIYMRrSJ cI81ya9SOZ7G/zLuSQQ/WxKZ9Ovoo5G4+e152vdn0MTpqQZCTJxJoEpr1Zak8unl3iN1om9YzyUIh tluPB2qldooK+T8RMTtj6zdxOLiqmjKnIREojAHOcaZzEZziuwy1OZX7c+AVOOjXsQ/BpYcRxVP0F rZm9lGAd5tgq0Upd5u5ggG6QwNwJLwQGeOmad1LvcpCQnylvWgWMIi+GveEsGylKrUIHNm5kryBKO vb7hTsZDjuRmfmet4iiZo9G+7pMgtBlPKK35Mp4zorTdr4SwbtWcgl6z7unyGRnHuXO+k3wLSVXqL JT2O8tVcKnpB7D7SHItg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pfl0T-0054FR-28; Fri, 24 Mar 2023 17:15:13 +0000 Received: from mail-wm1-x332.google.com ([2a00:1450:4864:20::332]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pfl0I-0054Bv-38 for linux-arm-kernel@lists.infradead.org; Fri, 24 Mar 2023 17:15:04 +0000 Received: by mail-wm1-x332.google.com with SMTP id u11-20020a05600c19cb00b003edcc414997so1458947wmq.3 for ; Fri, 24 Mar 2023 10:15:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1679678100; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=iTb8hl3+k2g5BleJPKEi21fxSb3Jo8zSKEOFv/5dzqM=; b=Sjs+e2MuGXM4+tmPbmahZDPk5vhmIGwM1TCJdHBvC/vfRdvIUj07fTTL5Wt/uaDaYu DfMJybSOkAeHgMxMvbMeNbajKEAsfOhtRrFJy8nQ9QMcHE2MtYMXpY5UHdm42LdjIudN vk7fz6LH3vojtLooWHY9sKvQRlThThT8omqho= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1679678100; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=iTb8hl3+k2g5BleJPKEi21fxSb3Jo8zSKEOFv/5dzqM=; b=ZjzPYvX3TH12GeuLeXS0FDQL7idNUqO8oTac/DjeInLLqhmkakyljMq8jdxFXnWydH tYdVnzaGeoOP2QqFOL4bf/ZaHFjw2FSDIUMOBwLUZRqecXwifHAbMoCTw948P96r8XkK Vc/IhBADxIah7iQ5SQtRVyDiPtgo/65rZTcGAV8Y14XRKg3QWV14+dhMPdoxoCRWCvSK yADtzpgLKRnpjl/iYFwfub5ZnSvretAzXuYfGC0K3pGTHHibgoh/WeIvdMr8Dez8pmet 8yYsHelpS6kiNLKrovHMyYdFVKHBzeP4/ih7ZI/eqYbQMAOqfr9LDYZCsZlKS+OQs25i bpPQ== X-Gm-Message-State: AO0yUKVsnOH5vsyxhma6utJiAqMIeilZ63KEFPEZem8/BRX0N70P2PXp pb2mSpoBSm3RajA78QahnuP16kCMJbaTEMaMHVA= X-Google-Smtp-Source: AK7set/IU3/IZnULMqGdchh7xP/nUBYFvkCopwb13gAO4K8vJUP4QfRzDq1ks8LMggPOywxWb/EIhQ== X-Received: by 2002:a05:600c:c6:b0:3ef:df3:1693 with SMTP id u6-20020a05600c00c600b003ef0df31693mr2530391wmm.32.1679678100550; Fri, 24 Mar 2023 10:15:00 -0700 (PDT) Received: from revest.zrh.corp.google.com ([2a00:79e0:9d:6:ffb1:35ba:1031:ba71]) by smtp.gmail.com with ESMTPSA id 26-20020a05600c231a00b003dc522dd25esm5385107wmo.30.2023.03.24.10.14.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 24 Mar 2023 10:15:00 -0700 (PDT) From: Florent Revest To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org, bpf@vger.kernel.org Cc: catalin.marinas@arm.com, will@kernel.org, rostedt@goodmis.org, mhiramat@kernel.org, mark.rutland@arm.com, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, kpsingh@kernel.org, jolsa@kernel.org, xukuohai@huaweicloud.com, lihuafei1@huawei.com, Florent Revest Subject: [PATCH v3 2/4] arm64: ftrace: Simplify get_ftrace_plt Date: Fri, 24 Mar 2023 18:14:49 +0100 Message-Id: <20230324171451.2752302-3-revest@chromium.org> X-Mailer: git-send-email 2.40.0.348.gf938b09366-goog In-Reply-To: <20230324171451.2752302-1-revest@chromium.org> References: <20230324171451.2752302-1-revest@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230324_101503_010214_C5B1E172 X-CRM114-Status: GOOD ( 12.05 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Following recent refactorings, the get_ftrace_plt function only ever gets called with addr = FTRACE_ADDR so its code can be simplified to always return the ftrace trampoline plt. Signed-off-by: Florent Revest Acked-by: Mark Rutland --- arch/arm64/kernel/ftrace.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/arch/arm64/kernel/ftrace.c b/arch/arm64/kernel/ftrace.c index 758436727fba..432626c866a8 100644 --- a/arch/arm64/kernel/ftrace.c +++ b/arch/arm64/kernel/ftrace.c @@ -195,15 +195,15 @@ int ftrace_update_ftrace_func(ftrace_func_t func) return ftrace_modify_code(pc, 0, new, false); } -static struct plt_entry *get_ftrace_plt(struct module *mod, unsigned long addr) +static struct plt_entry *get_ftrace_plt(struct module *mod) { #ifdef CONFIG_ARM64_MODULE_PLTS struct plt_entry *plt = mod->arch.ftrace_trampolines; - if (addr == FTRACE_ADDR) - return &plt[FTRACE_PLT_IDX]; -#endif + return &plt[FTRACE_PLT_IDX]; +#else return NULL; +#endif } static bool reachable_by_bl(unsigned long addr, unsigned long pc) @@ -270,7 +270,7 @@ static bool ftrace_find_callable_addr(struct dyn_ftrace *rec, if (WARN_ON(!mod)) return false; - plt = get_ftrace_plt(mod, *addr); + plt = get_ftrace_plt(mod); if (!plt) { pr_err("ftrace: no module PLT for %ps\n", (void *)*addr); return false;